Merge pull request #28191 from zimbatm/terraform-fmt-manyargs

command/fmt: support formatting multiple files

internal/command/fmt.go

@@ -55,11 +55,6 @@ func (c *FmtCommand) Run(args []string) int {
 	}
 
 	args = cmdFlags.Args()
-	if len(args) > 1 {
-		c.Ui.Error("The fmt command expects at most one argument.")
-		cmdFlags.Usage()
-		return 1
-	}
 
 	var paths []string
 	if len(args) == 0 {
@@ -68,7 +63,7 @@ func (c *FmtCommand) Run(args []string) int {
 		c.list = false
 		c.write = false
 	} else {
-		paths = []string{args[0]}
+		paths = args
 	}
 
 	var output io.Writer
@@ -528,15 +523,17 @@ func (c *FmtCommand) trimNewlines(tokens hclwrite.Tokens) hclwrite.Tokens {
 
 func (c *FmtCommand) Help() string {
 	helpText := `
-Usage: terraform [global options] fmt [options] [TARGET]
+Usage: terraform [global options] fmt [options] [target...]
 
   Rewrites all Terraform configuration files to a canonical format. Both
   configuration files (.tf) and variables files (.tfvars) are updated.
   JSON files (.tf.json or .tfvars.json) are not modified.
 
-  If TARGET is not specified, the command uses the current working directory.
-  If TARGET is a file, the command only uses the specified file. If TARGET
-  is "-" then the command reads from STDIN.
+  By default, fmt scans the current directory for configuration files. If you
+  provide a directory for the target argument, then fmt will scan that
+  directory instead. If you provide a file, then fmt will process just that
+  file. If you provide a single dash ("-"), then fmt will read from standard
+  input (STDIN).
 
   The content must be in the Terraform language native syntax; JSON is not
   supported.

internal/command/fmt_test.go

@@ -166,7 +166,16 @@ func TestFmt_snippetInError(t *testing.T) {
 	}
 }
 
-func TestFmt_tooManyArgs(t *testing.T) {
+func TestFmt_manyArgs(t *testing.T) {
+	tempDir := fmtFixtureWriteDir(t)
+	// Add a second file
+	secondSrc := `locals { x = 1 }`
+
+	err := ioutil.WriteFile(filepath.Join(tempDir, "second.tf"), []byte(secondSrc), 0644)
+	if err != nil {
+		t.Fatal(err)
+	}
+
 	ui := new(cli.MockUi)
 	c := &FmtCommand{
 		Meta: Meta{
@@ -176,16 +185,21 @@ func TestFmt_tooManyArgs(t *testing.T) {
 	}
 
 	args := []string{
-		"one",
-		"two",
+		filepath.Join(tempDir, "main.tf"),
+		filepath.Join(tempDir, "second.tf"),
 	}
-	if code := c.Run(args); code != 1 {
+	if code := c.Run(args); code != 0 {
 		t.Fatalf("wrong exit code. errors: \n%s", ui.ErrorWriter.String())
 	}
 
-	expected := "The fmt command expects at most one argument."
-	if actual := ui.ErrorWriter.String(); !strings.Contains(actual, expected) {
-		t.Fatalf("expected:\n%s\n\nto include: %q", actual, expected)
+	got, err := filepath.Abs(strings.TrimSpace(ui.OutputWriter.String()))
+	if err != nil {
+		t.Fatal(err)
+	}
+	want := filepath.Join(tempDir, fmtFixture.filename)
+
+	if got != want {
+		t.Fatalf("wrong output\ngot:  %s\nwant: %s", got, want)
 	}
 }
 

website/docs/cli/commands/fmt.mdx

@@ -45,10 +45,13 @@ and the generated files.
 
 ## Usage
 
-Usage: `terraform fmt [options] [TARGET]`
+Usage: `terraform fmt [options] [target...]`
 
-By default, `fmt` scans the current directory for configuration files. If
-you provide a directory for the `target` argument, then `fmt` will scan that directory instead. If you provide a file, then `fmt` will process just that file. If you provide a single dash (`-`), then `fmt` will read from standard input (STDIN).
+By default, `fmt` scans the current directory for configuration files. If you
+provide a directory for the `target` argument, then `fmt` will scan that
+directory instead. If you provide a file, then `fmt` will process just that
+file. If you provide a single dash (`-`), then `fmt` will read from standard
+input (STDIN).
 
 The command-line flags are all optional. The following flags are available: